Your file may be damaged beyond the ability of Recover to repair it. (And best practice is to not use recovered files but instead replace them with undamaged backups.) And any file that cannot be recovered should not be used again as it clearly has significant issues that can result in such frequent crashes.
I'm concerned about this sentence: "The file is stored on our common drive, however we access the file by opening it through FileMaker"
Is this a single user file or can two or more users access and use it at the same time? When you use FileMaker to open the file, do you use File | Open or File | Open Remote... ?
Two users attempting to access the same file on a shared drive simultaneously can corrupt the file.